TM 9-2320-289-34
10-21. AIR CONDITIONING SYSTEM SERVICING (M1010) (Con’t).
5.
8.
12.
NOTE
Ensure that refrigerant container (12) is upright when performing step 1.
1. Connect center hose (6) to valve on refrigerant container (12). With refrigerant container
upright, loosen center hose at manifold gage set and slowly open refrigerant container valve.
After 2 seconds, close refrigerant container valve and tighten center hose.
2. Invert refrigerant container (12) and place on a scale.
3. Open refrigerant container (12) valve and high side valve (4). Continue charging until scale
indicates that refrigerant container has decreased in weight by 70 oz. (1.97 kg). If refrigerant
container has decreased in weight by 70 oz. (1.97 kg), close refrigerant container valve and
high side valve and perform step 9.
4. f refrigerant container (12) has not decreased in weight by 70 oz. (1.97 kg), record weight
used in step 3. Close high side valve (4) and refrigerant container valve. Turn refrigerant
container upright and place on a scale,
Connect STE/lCE tester to STE/lCE DCA connector under dash. (See TM 9-4910 -571-12&P)
Start engine and operate at approximately 1500 rpm.
6. On air conditioner control panel, turn air selection lever to “OUTSIDE. ”
7. Slowly open refrigerant container (12) valve and low side valve (1). Adjust low side valve as
needed to prevent pressure on low side gage (2) from exceeding 50 psi (345 kPa) and
pressure on high side gage (3) from exceeding 240 psi (1 655 kPa).
When refrigerant container (12) has decreased in weight by a total of 70 oz. (1 .97 kg),
including charging done in step 3, close refrigerant container valve and low side valve (1).
9. Determine performance of air conditioning system by performing steps 7 and 8 in
paragraph 10-20.
10. Turn off engine, Disconnect STE/lCE tester from STE/lCE DCA connector under dash. (See
TM 9-4910-571-12&P)
11. Disconnect center hose (6) from refrigerant container (12) valve. Disconnect low pressure
hose (7) from low pressure line (8) valve and high pressure hose (5) from high pressure line
(9) valve.
Install protective caps on low pressure line (8) valve and high pressure line (9) valve.
10-83
